Hydraulic machine, hydraulic assembly having the hydraulic machine, and hydraulic axle having the hydraulic machine

Patent metadata

Field	Value
Publication number	US-11619214-B2
Application number	US-201916960970-A
Country	US
Kind code	B2
Filing date	Jan 7, 2019
Priority date	Jan 11, 2018
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A hydraulic machine includes a housing interior space and a group of hydrostatic working chambers which are mounted in said housing interior space so as to be rotatable about an axis of rotation and which, as the group rotates, are connectable alternately to a high pressure and to a low pressure of the hydraulic machine and exhibit leakage into the housing interior space. A heat exchanger device is accommodated in the housing interior space. The hydraulic machine may be associated with a hydraulic assembly and a hydraulic axle.

First claim

The invention claimed is:

1. A hydraulic machine comprising:
a housing interior;
a group of hydrostatic working chambers mounted in the housing interior and configured for rotation about an axis of rotation, said working chambers configured such that, upon rotation of the group, said working chambers are connectable in an alternating manner to a high pressure connection of pressure medium of the hydraulic machine and to a low pressure connection of the pressure medium of the hydraulic machine;
a plurality of pistons, each piston at least partially positioned within a corresponding working chamber of the group of hydrostatic working chambers;
a swash plate operably connected to the plurality of pistons, wherein the pressure medium is located in a portion of the housing interior that includes the swash plate; and
a heat exchanger device including a spiral tube portion located in at least the portion of the housing interior including the swash plate, the spiral tube portion defining an interior space that is isolated from the housing interior, such that the pressure medium is spaced apart from the interior space of the spiral tube portion, and the spiral tube portion defining an exterior tube surface that is in contact with the pressure medium.

2. The hydraulic machine as claimed in claim 1 , wherein the spiral tube portion, at least in sections, is located in an annular chamber of the housing interior that is defined between a housing inner wall and hydrostatic cylinder/piston units bounding the working chambers.

3. The hydraulic machine as claimed in claim 2 , wherein the annular chamber extends in a direction of the axis of rotation and around the axis of rotation.

4. The hydraulic machine as claimed in claim 1 , wherein the spiral tube portion of the heat exchanger device surrounds the axis of rotation in one of an annular and a polygonal manner.

5. The hydraulic machine as claimed in claim 1 , wherein:
a fluid is arranged in a single phase or in two phases in the interior space of the spiral tube portion of the heat exchanger device, and
the fluid is water.

6. The hydraulic machine as claimed in claim 1 , wherein:
the spiral tube portion is a first spiral tube portion,
the heat exchanger device includes a second spiral tube portion located in the housing interior,
the first and second spiral tube portions extend coaxially along the axis of rotation, and
the first and second spiral tube portions overlap each other along the axis of rotation.

7. The hydraulic machine as claimed in claim 1 , further comprising:
a housing which defines the housing interior, the housing having a first side configured such that:
a drive shaft which is rotatable about the axis of rotation and to which the swash plate and cylinder/piston units are connected for rotation therewith, and a feed and a return of the heat exchanger device pass through the first side; or
connections of the high pressure and of the low pressure and the feed and the return of the heat exchanger device pass through the first side.

8. The hydraulic machine as claimed in claim 3 , wherein the annular chamber extends around the axis of rotation predominantly in one of a cylindrical, a conical, and an oval manner.

9. The hydraulic machine as claimed in claim 1 , wherein the spiral tube portion extends around the axis of rotation in one of a circular, a square, a hexagonal, and an octagonal manner.

10. The hydraulic machine as claimed in claim 1 , wherein:
the spiral tube portion includes a plurality of turns defining the spiral tube portion, and
the turns are positioned against each other along the axis of rotation.

11. The hydraulic machine as claimed in claim 1 , wherein: an exterior piston surface of each piston of the plurality of piston is located between the swash plate and the group of hydrostatic working chambers, and each of the exterior piston surfaces is located in the portion of the housing interior including the swash plate and is in contact with the pressure medium.

12. A hydraulic assembly comprising:
a hydraulic machine comprising:
a housing defining a housing interior;
a group of hydrostatic working chambers mounted in the housing interior configured for rotation about an axis of rotation, said working chambers configured such that, upon rotation of the group, said working chambers are connectable in an alternating manner to a high pressure connection of pressure medium of the hydraulic machine and to a low pressure connection of pressure medium of the hydraulic machine;
a plurality of pistons, each piston at least partially positioned within a corresponding working chamber of the group of hydrostatic working chambers;
a swash plate operably connected to the plurality of pistons, wherein the pressure medium is located in a portion of the housing interior that includes the swash plate; and
a heat exchanger device including a spiral tube portion located at least in the portion of the housing interior including the swash plate, the spiral tube portion defining an interior space that is isolated from the housing interior, such that the pressure medium is spaced apart from the interior space of the spiral tube portion, and the spiral tube portion defining an exterior tube surface that is in contact with the pressure medium;

a drive machine fixedly connected to the hydraulic machine and configured to transmit a torque to the hydraulic machine; and
a pressure medium container configured to contain the pressure medium, the pressure medium container fixedly connected to the hydraulic machine and configured to be connected to at least one of the low pressure connection and the high pressure connection.

13. The hydraulic assembly as claimed in claim 12 , wherein the drive machine is an electric machine.

14. A hydraulic axle comprising:
a hydraulic machine comprising:
a housing defining a housing interior;
a group of hydrostatic working chambers mounted in the housing interior and configured for rotation about an axis of rotation, said working chambers configured such that, upon rotation of the group, said working chambers are connectable in an alternating manner to a high pressure connection of pressure medium of the hydraulic machine and to a low pressure connection of the pressure medium of the hydraulic machine;
a plurality of pistons, each piston at least partially positioned within a corresponding working chamber of the group of hydrostatic working chambers;
a swash plate operably connected to the plurality of pistons, wherein the pressure medium is located in a portion of the housing interior that includes the swash plate; and
a heat exchanger device including a spiral tube portion located at least in the portion of the housing interior including the swash plate, the spiral tube portion defining an interior space that is isolated from the housing interior, such that the pressure medium is spaced apart from the interior space of the spiral tube portion, and the spiral tube portion defining an exterior tube surface that is in contact with the pressure medium;

a drive machine fixedly connected to the hydraulic machine and configured to transmit a torque to the hydraulic machine,
a hydraulic cylinder fixedly connected to the hydraulic machine, the hydraulic machine configured to supply the pressure medium to the hydraulic cylinder; and
a control block fixedly connected to the hydraulic machine and configured to control the supply of the pressure medium to the hydraulic cylinder.

15. The hydraulic axle as claimed in claim 14 , wherein the drive machine is an electric machine and the control block is a valve control bloc

Assignees

• Bosch Gmbh Robert

Inventors

• Guender Andreas
• Bierod Jan Lukas
• Schwacke Johannes
• Ryznar Saskia
• Stefanjuk Oleg
• Scholz Marco
• Hanauer Emil
• Huettl Rene

Classifications

• F04B1/20 Primary

  having rotary cylinder block · CPC title

• F03C1/0636

  having rotary cylinder block · CPC title

• F04B1/2042

  Valves · CPC title

• F04B1/2021 Primary

  characterised by the contact area between cylinder barrel and valve plate · CPC title

• F04B1/2014

  Details or component parts · CPC title